1. antispambot()
...
zeroize()

2. $ whoami

3. Yoav Farhi
Developer
blog.yoavfarhi.com
@yoavf

4. $ pwd

6. //antispambot()
/**
* Converts email addresses characters to HTML entities
* to block spam bots.
*
* @return string Converted email address.
*/
function antispambot($emailaddy, $mailto=0)
?>
Email me at:
<?php echo antispambot('yoav@farhi.org'); ?>
Email me at:
yo&#97;v&#64;&#102;a&#114;&#104;&#105;&#46;org

7. //checked(), selected(), disabled()
/**
* Outputs the html checked attribute.
*
* Compares the first two arguments and if identical
* marks as checked
*
* @return string html attribute or empty string
*/
function checked( $checked, $current = true, $echo = true )
?>
<input type='checkbox' name='postlink' value='1' <?php if
( 1 == $postlink ) echo 'checked="checked"'; ?> />
<input type="checkbox" name="postlink" value="1" <?php
checked( $postlink, 1 ); ?> />

8. //human_time_diff()
/**
* Determines the difference between two timestamps.
*
* The difference is returned in a human readable
* format such as "1 hour", * "5 mins", "2 days".
* @return string Human readable time difference.
*/
function human_time_diff( $from, $to )
?>
<?php echo human_time_diff(get_comment_time('U')).' ago';?>
//2 days ago

9. //wp_list_pluck()
/**
* Pluck a certain field out of each object in a list.
* @return array
*/
function wp_list_pluck( $list, $field );
$foods = array(
! array(
! ! 'name' => 'Banana',
! ! 'color' => 'Yellow',
! ),
! array(
! ! 'name' => 'Apple',
! ! 'color' => 'Red',
! ),
);
$foods_names = wp_list_pluck( $foods, 'name' );
//$foods_names = array( 'Banana','Apple' );
$color_names = wp_list_pluck( $foods, 'color' );
//$color_names = array( 'Yellow','Red' );

10. //wp_localize_script()
//wordcamp.js
jQuery(document).ready(function($){
alert('Welcome to WordCamp Jerusalem 2013');
});
});

11. //wp_localize_script()
/**
* Used to localizes a script.
*
* @return bool Whether the localization was
* added successfully.
*/
function wp_localize_script( $handle, $object_name, $l10n );
?>
<?php
wp_enqueue_script( 'wordcamp-jeruslaem', 'wordcamp.js' );
$translation_array = array(
'welcome' => __( 'Welcome to WordCamp Jerusalem 2013' )
);
wp_localize_script( 'wordcamp-jeruslaem', 'wc_strings',
$translation_array );
?>
<script>
var wc_strings = {
welcome: '2013 ‫,'ברוכים הבאים לוורדקמפ ירושלים‬
};
</script>

12. //wp_localize_script()
// WordCamp.js
jQuery(document).ready(function($){
alert( wc_strings.welcome );
});
});

13. Let’s get to work
cc-by galato901
http://yoav.fr/towork

14. //wp_kses()
/**
* Filters content and keeps only allowable HTML elements.
*
* @return string Filtered content with only
* allowed HTML elements
*/
function wp_kses($string, $allowed_html, $allowed_protocols);
$tags = array(
'em' => array(),
'strong' => array()
);
$html = <<<EOT
<p>
! <b>BOLD</b> is different than <em>italics</em>
</p>
EOT;
echo wp_kses( $html, $tags );
//BOLD is different than <em>italics</em>

15. //wp_mail()
/**
* Send mail, similar to PHP's mail
*
* @return bool Whether the email contents were sent
* successfully.
*/
function wp_mail( $to, $subject, $message, $headers =
'', $attachments = array() );
$to = 'yoav@farhi.org';
$subject = 'I love WordPres';
$message = 'WordPress is The Awesome!!!1';
$mail = wp_mail( $to, $subject, $message );
if( $mail )
! echo 'Mail sent';

16. //wp_remote_get()
/**
* Retrieve the raw response from the HTTP
* request using the GET method.
*
* @return WP_Error|array The response or
* WP_Error on failure.
*/
function wp_remote_get( $url, $args = array() );
$url = 'http://nominatim.openstreetmap.org/search?
q=Netanya&format=json';
$response = wp_remote_get( $url );
if ( ! is_wp_error( $response ) )
! //Do something

17. //wp_trim_words()
/**
* Trims text to a certain number of words.
*
* @return string Trimmed text.
*/
function wp_trim_words( $text, $num_words = 55, $more = null );
$text = "I love WordPress and Joomla";
echo wp_trim_words( $text, 3 );
// I Love WordPress

18. //zeroise()
/**
* Add leading zeros when necessary.
*
* @return string Adds leading zeros to number if needed.
*/
function zeroise($number, $threshold);
$comno = get_comments_number();
// $comno = '2'
$zeroed = zeroise($comno, 2);
// $zeroed = '02'

19. cc by-nc-nd anarosaphotography
http://yoav.fr/happy
Happy

20. questions ?

21. How can I get involved
with the WordPress.org
community?